class_docstr: Samples elements from [start, start+length) sequentially.
  
  Parameters
  ----------
  length : int
      Length of the sequence.
  start : int, default is 0
      The start of the sequence index.
code: def __init__(self, length, start=0):
      self._length = length
      self._start = start
  
imports: import numpy
label_desc: Use image node_id 1 to create a new SequentialSampler object from inherited base classes: Sampler with example: obj = SequentialSampler(length, start)